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Old 21 October 2012, 06:36   #1
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Photos of roller trailers / Vipermax hulls

Help: Can anybody with a Vipermax post a picture showing the roller setup at the rear, to show how and where and how well it touches the hull. I'm trying to get an idea of how many rollers can be in a roller group before the fore-aft curve of the hull starts to mean the front and rear roller sets aren't touching, or aren't doing anything useful. I suspect five pairs will be OK, maybe six, but not really sure.

I had been looking at the Roller Ramp type conversion kits, but I'm reasonably sure that these will suffer the same problem I have which is that the boat weight is only supported in the middle and the boat will see-saw on the trailer, like it does at the moment. So plan B is to look at ordering a modified spec of trailer, probably an SBS R2-1800 chassis fitted with the roller sets from one of their larger trailer models to give better hull support.

Ta
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Old 21 October 2012, 10:20   #2
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Does this help?
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Old 21 October 2012, 11:44   #3
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Hi S

Heres some pics of Gwenn sat on her trailer...

I built it using a type of roller ramp design which works pretty well however due to the pronounced depth of the bow compared to the stern, the keel only sits on the forward 5 rollers ( and i had to shim these to suit using nylon blocks.)

All in all she sits on 20 side rollers and 5 keel rollers and has always sat nice and tight when towed.

The rear keel rollers are there purely the guide her onto the trailer when recovering.

BTW, if anyone is reading this and needs a new trailer, this one will be going up for sale shortly. Only been in the water twice, 2000kg twin Alko waterproof axles with flushing kit. All fasteners and brake cables in SS etc... . PM me for details

Simon

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Old 21 October 2012, 16:58   #4
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Old 21 October 2012, 17:03   #5
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One more:
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Old 21 October 2012, 17:49   #6
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Any good?

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Old 21 October 2012, 17:51   #7
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Old 21 October 2012, 18:45   #8
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These pics were of the early days when I was using an Admiral trailer, my De Graaff trailer is set up exactly the same way.
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Old 21 October 2012, 20:10   #9
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Thanks all, I was really looking for close ups along the lines of Anchorhandler's pics, to get an idea of how evenly the weight sits on the rollers.

A related question: who do we think makes the strongest trailer chassis? DHD's CLK looks pretty beefy compared to most makes, but of course you can't see wall thickness.
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Old 21 October 2012, 20:30   #10
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